How does the entropy change in the reaction 2C2H2 (g) + 5O2 (g) 4CO2 (g) + 2H2O (l) ?

A. The entropy increases.

B. The entropy stays constant.

C. The entropy decreases.

D. It is impossible to tell.

What does Hund's rule state? An orbital can contain two electrons only if the electrons have opposite spins. An orbital can contain two electrons only if all other orbitals at that sublevel are empty.

How many significant figures are in the measurement 33,050 grams?

Give me some facts about Mercury, Venus, the Earths Moon, Mars, Jupiter, Saturn, Uranus, and Neptune

Suggest a mechanism that is consistent with a second order rate law

Which of the following best describes why MnSO4 - > MnO+SO3 is not a synthesis reaction? A. Oxygen is not a reactant in this reaction B. The reaction has more than one product C. The equation is not balanced. D.

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s) + N2 (g) → 2Li3N (s) How many moles of lithium are needed to produce 0.60 mol of Li3N when the reaction is carried out in the presence of excess nitrogen?

7. Convert 5.2 cm of magnesium (Mg) ribbon to mm of Mg ribbon.

If you place a crystal substance on a tabletop, return to view it after some time passes, and find it as a powdered substance, which of the following processes most likely took effect? A. Efflorescence B. Distillation

What changes occur in the nuclei of atoms involved in the reactions that fuel nuclear power plants?

Calculate the molar mass for HCN. 0.2703 g/mol 2.703 g/mol 27.03 g/mol 270.3 g/mol